Lock mechanism



July 1, 19414 R SPEER 2,247,621

LOCK MECHANISM Filed July 30, 1940 A itomey Patented July 1, 1941 j,umeof TAT 5 Claims.

The present invention relates to new and useful improvements in lockmechanisms.

The primary object of the invention is to provide a lock mechanism whichwill be pick-proof.

Other objects of the invention are to provide a lock mechanism whichwill be comparatively simple in construction, durable and reliable inuse, and which may be manufactured at low cost.

Still other objects and advantages of the invention will become apparentfrom a study of the following detailed description taken in connectionwith the accompanying drawing wherein like characters of referencedesignate corresponding parts throughout the several views, wherein:

Figure 1 is a side elevational view of my invention.

Figure 2 is a front elevational view of the invention.

Figure 3 is a rear elevational view of the invention.

Figure 4 is a longitudinal vertical sectional view taken substantiallyon the line 4-4 of Fig. 2.

Figure 5 is a transverse sectional view taken substantially on the line55 of Fig. 4.

Referring now to the drawing, in detail, it will be seen that thereference numeral ID designates a barrel, constructed of suitablematerial, and provided with a bore II which terminates in a counterboreI2 at its back end and a counterbore I 3 at its face or front end.Vertical bores H are formed in the barrel l and communicate with thebore ll while a bore l extends vertically in the barrel l0 andcommunicates with the counterbore [2. The top portion I 8 of the barrelII is flat intermediate its end portions as shown in Figs. 4 and 5 ofthe drawing.

A rotatable key guide I! is mounted in the bore II. This rotatable keyguide I! is flanged as at I8 which flange is seated in the counterborel3 when the key guide I! is in position. The key guide I! is closed atits back end portion and it also has a tortuous keyway I9 substantiallythroughout its length which communicates with openings 20 in its topside.

The key guide I! is rotatably anchored in the bore ll through the mediumof a screw 2| which passes through an opening in the back of a swinginglever 22.

The lever 22 has a cup shaped end portion 23 in which is received theend of the key guide I! with the cup shaped end portion 23 engaged inthe counterbore l2. The cup shaped end portion 23 of the lever 22 alsohas an opening 24 formed therein for receiving a tumbler pin to locksaid portion 23 to the key guide I! to rotate E5 PATE Q 1 05 A2,247,621. f V LOCK- MECHANISM I RobertA. S peer, Detroit, ApplicationJuly 30, 1940, Serial'No. 348,510" P1 therewith on insertion and turningof a proper key.

Pins 25 in the bores M are pressed by springs 26 against pins 21 in thekey guide I! while a pin 28 is pressed by a spring 29 against a pin 30which is engaged in the opening 24 of the cup shaped portion 23 of thelever 22 and one of the openings of the key guide [1.

The springs 26 and 29, and pins and 28 are held in position by a coverplate 3| as shown in Figs. 4 and 5 of the drawing.

The lever 22 may be engaged with a bolt 32 as shown in Fig. 3 orotherwise used to operate a locking bolt.

When the lever 22 is operated to move the bolt 32 the key 33 is insertedin the key guide I! at which time the pins 21 are elevated and caused toforce the pins 25 to be disengaged from the openings 20 while the pin iscaused to force the pin 28 from the opening in the cup shaped portion 23of the lever 22 at which time the lever 22 may be swung by turning thekey 33,

Although I have shown and described herein a preferred embodiment of myinvention it is to be definitely understood that I do not desire tolimit the application of the invention thereto, and any change orchanges may be made in the structure and arrangement of the severalparts, within the spirit of the invention as claimed.

What is claimed is:

1. In a device of the character described, a lock mechanism including abody member having a longitudinal bore terminating in counter borestherein and further having vertical bores therein, a flanged key guidemounted in said longitudinal bore with the flange in one of said counterbores, a cup-shaped member rotatably secured to said key guide andengaged in said other counter bore and a lever extending from saidcup-shaped member.

2. In a device of the character described, a lock mechanism including abody member having a longitudinal bore and vertical bores therein, a keyguide engaged in said longitudinal bore, a cup-shaped member rotatablysecured to said key guide to hold the same in said longitudinal bore,key operated detent means in said vertical bores releasably engaged withsaid key guide, a lever extending from said cup-shaped member formovement therewith and key operated means engageable with saidcup-shaped member for rotating the same with said key guide.

3. In a device of the character described, a lock mechanism including abody member, a rotatable member mounted in said body member, a

cup-shaped member rotatably'mounted on said rotatable member, keyoperated slidable means for engaging said cup-shaped member with saidrotatable member for rotation therewith and a lever extending from saidcup-shaped member.

4. In a device of the character described, a lock mechanism including abody member having a longitudinal bore terminating in counter borestherein and further having vertical bores therein, a flanged key; guidehaving openings therein mounted -in said longitudinal bore with theflange in one of said counter bores, a cup-shaped member rotatablysecured to said key guide and err gaged in the other of said counterbores, said in said key guide for engagement in the opening in saidcup-shaped member touliqtato;thelsamel gaged in said other counter-bore,saidcup-shaped member having a vertical bore therein, pins in saidvertical bores in said body and key guide, one of said pins in said bodybeing engageable in thelverti cal bore in said cup-shaped member, and

a lever extending from said cup-shaped member.

ROBERT A. SPEER.

